کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
579754 | 877826 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optimization of polyhydroxybutyrate (PHB) production by excess activated sludge and microbial community analysis
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کلمات کلیدی
PolyhydroxyalkanoatesPHBMPCTMPCCMLSSPHAsPCR-DGGENMDSSBRsRTdissolved oxygen - اکسیژن محلولchemical oxygen demand - تقاضای اکسیژن شیمیاییSludge retention time - زمان نگهداری لجنExcess activated sludge - لجن فعال بیش از حدmixed liquor suspended solids - مخلوط محلول جامد مایعnon-metric multidimensional scaling - مقیاس چند بعدی غیر متریکIntermittent aeration - هوای متناوبPolyhydroxybutyrate - پلی هیدروکسی بوتیرتCod - کادو
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, a high value-added and biodegradable thermoplastic, polyhydroxybutyrate (PHB), was produced by excess activated sludge. The effects of the nutritional condition, aeration mode, sodium acetate concentration and initial pH value on PHB accumulation in the activated sludge were investigated. The maximum PHB content and PHB yield of 67.0% (dry cell weight) and 0.740 gCOD gCODâ1 (COD: chemical oxygen demand), respectively, were attained by the sludge in the presence of 6.0 g Lâ1 sodium acetate, with an initial pH value of 7.0 and intermittent aeration. The analysis of the polymerase chain reaction (PCR)-denaturing gradient-gel-electrophoresis (DGGE) sequencing indicated that the microbial community of the sludge was significantly different during the process of PHB accumulation. Three PHB-accumulating microorganisms, which were affiliated with the Thauera, Dechloromonas and Competibacter lineages, were found in the excess activated sludge under different operating conditions for PHB accumulation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 185, Issue 1, 15 January 2011, Pages 8-16
Journal: Journal of Hazardous Materials - Volume 185, Issue 1, 15 January 2011, Pages 8-16
نویسندگان
Zhenggui Liu, Yuanpeng Wang, Ning He, Jiale Huang, Kang Zhu, Wenyao Shao, Haitao Wang, Weilong Yuan, Qingbiao Li,